Great day to teach your kids, grandkids, nieces or nephews about pi. Challenge them to measure things and see how close they can get to the constant. My challenge to one particular little girl ended up in a flurry of 6 measurements with a tape measure, the closest of which was 3.1416. Not bad!

For more on Pi and Pi Day, as well as Pi to one million digits, see here.

Who is A.O.?

We're two old friends taking a stroll through every episode of Doctor Who, from its debut on November 23, 1963, to present. Witness our attacks, feints, ripostes, and sundry gaffes as we duke it out from Who's early days through the present and find out what makes "Who."
Over 771 episodes. Over 86 different writers. Fight! Join us!